CN111424564A - Bridge erecting method and bridge erecting machine for realizing bridge erecting method - Google Patents
Bridge erecting method and bridge erecting machine for realizing bridge erecting method Download PDFInfo
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- CN111424564A CN111424564A CN202010423184.8A CN202010423184A CN111424564A CN 111424564 A CN111424564 A CN 111424564A CN 202010423184 A CN202010423184 A CN 202010423184A CN 111424564 A CN111424564 A CN 111424564A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
- E01D21/105—Balanced cantilevered erection
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Abstract
The invention belongs to the technical field of bridge erection, and relates to a bridge erection method and a bridge erection machine for realizing the bridge erection method. The bridge comprises a plurality of middle piers, and the bridge erecting method comprises the steps of firstly installing pier top sections on the middle piers, and installing pier top support legs on the pier top sections, wherein the pier top support legs support a main beam of the bridge erecting machine; and then assembling pier top sections from the pier top sections of each middle pier to form a T-shaped cantilever. The invention solves the technical problem of low construction efficiency of the multi-span bridge in the prior art, and achieves the technical effect of improving the construction efficiency.
Description
Technical Field
The invention belongs to the technical field of bridge erection, and particularly relates to a bridge erection method and a bridge erection machine for realizing the bridge erection method.
Background
In recent years, with the rapid development of social economy and modern construction, bridge construction has also been rapidly developed. Meanwhile, the segment prefabrication and assembly technology in bridge construction is greatly popularized, the segment assembly bridge technology can not be developed without updating and applying segment assembly equipment, and the segment assembly bridge girder erection machine is one of the most widely applied segment assembly equipment. The construction process suitable for the segment assembling bridge girder erection machine comprises cantilever assembling and span-by-span assembling.
The balanced cantilever assembly is a common construction method for prefabricating and assembling bridge sections, and the principle of the method is that T-shaped cantilevers are formed by symmetrically assembling sections on two sides from a pier top section of a pier top, and then span-middle closure is carried out between every two adjacent cantilevers to form a multi-span continuous bridge. At present, when a segment assembling bridge girder erection machine carries out cantilever assembling on a continuous beam, after 1T-shaped cantilever is symmetrically assembled in a suspension mode, the bridge girder erection machine needs to stride and be in place and anchor a middle supporting leg on a pier top section box girder so as to facilitate the suspension assembling of the next T-shaped cantilever and further to span and close a dragon. When the three-span continuous beam is segmented and assembled, the construction method has low efficiency, and the hole passing operation procedure of the bridge girder erection machine is complicated and has poor safety.
When the bridge segment is assembled, the small crane handle arranged at the top of the main beam needs to be installed after the beam segment is lifted from the lower part of the beam segment, and in the actual construction process, because of the limitation of construction site conditions such as river crossing and the like below the beam segment, the beam transporting vehicle is difficult to transport to the lower part of the beam segment, and the crane cannot feed the beam below or laterally.
Disclosure of Invention
The invention aims to provide a bridge erecting method and a bridge erecting machine for the bridge erecting method, which can solve the technical problem of low construction efficiency of assembly of balance cantilevers in the prior art.
In a first aspect, the invention provides a bridge erection method, wherein the bridge comprises a plurality of middle piers, the bridge erection method comprises the steps of firstly installing pier top sections on the middle piers, and installing pier top support legs on the pier top sections, wherein the pier top support legs support a girder of a bridge girder erection machine; and then assembling pier top sections from the pier top sections of each middle pier to form a T-shaped cantilever.
The invention in the aspect has the beneficial effects that:
by installing the pier top sections on each middle pier firstly and installing the pier top sections gradually based on the pier top sections on each middle pier, the span closure can be carried out without spanning, the complex procedure of spanning is effectively avoided, the construction period is shortened, and the construction efficiency is improved.
In an alternative embodiment, in the step of forming the T-shaped cantilever, the pier-top segments are installed in pairs from the proximal side to the distal side alternately for each of the pier-top segments on different ones of the intermediate piers.
In an alternative embodiment, temporary supports are provided beside the intermediate pier to support the girders prior to installation of the pier top segments to the intermediate pier; and after the pier top sections are installed on each middle pier, the temporary support is dismantled before the pier top sections which interfere with the temporary support are installed on the middle pier.
In an alternative embodiment, a pier top leg is installed on the pier top segment and the main girder is supported by the pier top leg before the temporary support is removed.
In an alternative embodiment, the construction of the wet middle-span joint is carried out when the pier top sections on the middle piers on two sides of the same span are closed.
In an alternative embodiment, when the pier top segment is installed on each intermediate pier, the pier top segments are installed on each intermediate pier sequentially from near to far from one end of the main beam.
In an alternative embodiment, when each of the coping segments or the inter-coping segments is installed, the coping segment or the inter-coping segment is first hoisted and transported by a revolving crown block at the first end of the main beam, and then the revolving crown block is used to drive the coping segment or the inter-coping segment to rotate, and then the coping segment or the inter-coping segment is installed in place.
In an optional embodiment, the construction method further comprises a side pier segment construction step, wherein the side pier segment construction step comprises the steps of erecting a bracket beside the side pier and placing the side pier segment on the bracket.
In an alternative embodiment, the side pier segment and the pier top inter-segment are glued and prestressed tensioned.
The second aspect of the present invention is to provide a bridge erecting machine for implementing the bridge erecting method, which solves the technical problem of the prior art that a vehicle needs to be driven to the side of the middle pier.
The bridge girder erection machine for implementing the bridge erection method according to any one of the preceding embodiments includes a main girder and a support device, wherein the support device includes an end support device and a side support device, the side support device includes a side support leg for being mounted on a side bridge pier, and the end support device supports at least one end of the main girder.
The invention in the aspect has the beneficial effects that:
because the bridge girder erection machine provided by the aspect supports the main girder through the side supporting legs, and the end supporting device is arranged at one end of the main girder, the crown block on the main girder can hoist the segment at one end of the main girder and convey the segment to the corresponding pier or connect the fixed segment, and the crane can be started as long as the vehicle for transporting the segment runs to the side of the side pier, so that the vehicle without carrying the segment runs to the side of the middle pier and then hoists, and the requirement on site conditions is reduced.
Drawings
In order to more clearly illustrate the present embodiment or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiment or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to the drawings without creative efforts for those skilled in the art.
Fig. 1 is a schematic view of a basic flow of a bridge erecting method according to an embodiment of the present invention;
FIG. 2 is a schematic view of a slewing crown block hoisting a pier top segment from a first end car of a main girder in the method of the first embodiment;
fig. 3 is a schematic view of the method of the first embodiment, wherein the first pier top leg is installed at the pier top section of the first intermediate pier;
FIG. 4 is a schematic view of the method according to the first embodiment, in which the front revolving crown block is hoisted and moves the first pier top inter-section of the first intermediate pier to the direction of the first intermediate pier in the large mileage direction;
fig. 5 is a schematic view of a small-mileage direction in which the rear revolving crown block hoists and moves the first pier top intermediate section of the first intermediate pier to the first intermediate pier in the method according to the first embodiment;
figure 6 is a schematic view of the hoisting of the first pier top segment of the second intermediate pier in the method according to the first embodiment;
fig. 7 is a schematic view of the hoisting of the second coping section of the first intermediate pier in the method according to the first embodiment;
FIG. 8 is a schematic diagram of a cross-mid dragon in the method of the first embodiment;
FIG. 9 is a schematic view of the assembly of pier segments according to the method of the first embodiment.
Icon: 101-a main beam; 102-a front leg; 103-a first pier top leg; 104-a second pier top leg; 105-rear leg; 106-end support means; 107-front revolving crown block; 108-turning the crown block backwards; 109-a temporary scaffold; 110-a bracket; 111-multidirectional regulating oil top; 112-a first intermediate pier; 113-a second intermediate pier; 114-pier top segment; 116-a first pier; 117-second pier; 118-pier top segment; 119-side pier segment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present embodiments more clear, the technical solutions in the present embodiments will be described clearly and completely with reference to the drawings in the present embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of the present embodiments, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the product conventionally places when used, and are only used for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "first type", "second type", "third type", etc. are used for distinction only, and are uniformly described with respect to the same type of component or feature, meaning that the number of the component or feature may be plural, but it is not denied that the number of the component or feature may be one.
Furthermore, the terms "horizontal", "vertical", "suspended", and the like do not imply that the components are required to be absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a bridge erecting method, where a bridge includes a plurality of intermediate piers, and the bridge erecting method includes installing a pier top segment 118 on each intermediate pier, and installing a pier top leg on each pier top segment 118, where the pier top leg supports a girder 101 of a bridge girder erection machine; the inter-pier segments 114 are then assembled starting with the pier top segment 118 of each intermediate pier to form a T-shaped cantilever. It should be noted that, the intermediate pier referred to herein is a pier to which the vehicle of the transportation segment cannot directly drive, but only drives to a side of a pier adjacent to the pier far from the pier, or drives to a pier far away from the pier. Specifically, in the present embodiment, the intermediate pier includes a first intermediate pier 112 and a second intermediate pier 113.
By installing the pier top sections 118 on each middle pier and gradually installing the pier top sections 114 based on the pier top sections 118 on each middle pier, the span-in closure can be performed without the need of spanning, the complex procedure of spanning is effectively avoided, the construction period is shortened, and the construction efficiency is improved.
In particular, in an alternative embodiment, as shown in fig. 4-7, during the step of forming the T-cantilevers, alternating pairs of crest segments 118 on different intermediate piers are paired proximally and distally with inter-crest segments 114, respectively.
By alternately installing the pier top inter-section 114 to the pier top sections 118 on different intermediate piers, the pier top inter-section 114 of one pier top section 118 can be hoisted, spliced and temporarily and permanently prestressed to be tensioned within the time of grouting the prestressed pipeline of the pier top inter-section 114 of the other pier top section 118, different operations can be carried out on different pier top sections 118 within the same time period, various operation programs can be carried out in parallel, and the operation efficiency is improved.
In addition, by installing the pier top segments 114 in pairs from the near to the far, the balance of each pier top segment 118 can be maintained, and the damage to the connection structure of the pier top segments 118 and the middle pier due to the excessive additional torque generated by the excessive pier top segments 114 on one side can be avoided.
As shown in fig. 2-4, in an alternative embodiment, temporary braces 109 are provided alongside the intermediate pier to support the girders 101 prior to installation of the pier top segments 118 to the intermediate pier; after the pier top segment 118 is installed for each intermediate pier, the temporary brace 109 is removed before the intermediate pier is installed with the one pier top inter-segment 114 that interferes with the temporary brace 109. Specifically, in the present embodiment, taking the first intermediate pier 112 as an example, since the temporary brace 109 is provided in the large range direction of the first intermediate pier 112, the temporary brace 109 beside the first intermediate pier 112 needs to be removed before the inter-pier segment 114 in the large range direction of the first intermediate pier 112 is installed, and the temporary brace 109 does not need to be removed before the inter-pier segment 114 in the small range direction of the first intermediate pier 112 is hoisted.
The temporary supports 109 are arranged beside the middle bridge pier, so that the main beam 101 can be supported at a plurality of positions, the rigidity of the main beam 101 is improved, and overlarge deformation and structural damage even when the overhead travelling crane on the main beam 101 hoists the pier top segment 118 are avoided. After the pier top segment 118 is installed, a support can be installed on the pier top segment 118 to support the main beam 101, meanwhile, the overhead crane hoisting segment does not interfere with the support when moving horizontally, and after the temporary support 109 is removed, subsequent installation of the pier top segment 114 and the pier top segment 118 and installation between the pier top segments 114 are facilitated.
In an alternative embodiment, shown in fig. 2-4, the pier top legs are installed on the pier top segments 118 and the main girders 101 are supported by the pier top legs before the temporary support 109 is removed. Specifically, in the present embodiment, the pier top legs include a first pier top leg 103 and a second pier top leg 104.
By supporting the main beam 101 with the pier top legs, the rigidity of the main beam 101 can be ensured, and the burden of the temporary support 109 is released, so that the removal of the temporary support 109 is facilitated, and the subsequent installation of the pier top inter-section 114 and the pier top section 118 is prevented from being hindered. Meanwhile, the girder 101 is supported by using the pier top legs, which have a height significantly smaller than that of the temporary support 109 because the bottom of the pier top legs is the pier top section 118. Because the length and height of the pier top supporting legs are not large, and the pier top supporting legs can also be made of materials with higher rigidity, the pier top supporting legs occupy less width of the main beam 101 relative to the temporary supports 109, and the overhead travelling crane can not be interfered with conveying other pier top sections 118 and pier top sections 114.
In an alternative embodiment, mid-span wet joint construction is performed with the inter-pier segments 114 on the same side-span intermediate pier closed, as shown in fig. 8.
Through the construction of wet joints, the destructive cracks of the concrete at the closure section caused by expansion and contraction or contraction of cement can be reduced or avoided.
As shown in fig. 2 to 4, in an alternative embodiment, when the coping section 118 is installed at each intermediate pier, the coping section 118 is installed on each intermediate pier sequentially from the proximal end to the distal end of the main girder 101.
By installing the pier top sections 118 to the middle pier from one end of the main beam 101 from near to far, after one pier top section 118 is installed, the main beam 101 is supported by using the pier top section 118, the corresponding temporary support 109 beside the middle pier is removed, and obstacles are cleared away for the overhead traveling crane to convey the pier top section 118 to the middle pier farther from one end of the main beam 101.
As shown in fig. 2, when each pier top segment 118 or pier top inter-segment 114 is installed, the first end of the main beam 101 is hoisted by a revolving crown block and transports the pier top segment 118 or pier top inter-segment 114, the revolving crown block is used to drive the pier top segment 118 or pier top inter-segment 114 to rotate, and then the pier top segment 118 or pier top inter-segment 114 is installed in place.
The pier top section 118 or the pier top inter-section 114 is hoisted by arranging the rotary crown block, and the rotary crown block is used for transporting firstly and then rotating the corresponding section, so that vehicles in the transportation stage can drive into the lower part of the rotary crown block at an angle basically parallel to the length direction of the bridge, and the sections can pass through the pier top supporting legs and the supporting legs at an angle parallel to the length direction of the bridge, thereby facilitating the moving transportation of the stages on the girder 101, being convenient for hoisting the sections at one end of the girder 101, and being capable of installing a plurality of middle piers.
As shown in fig. 9, in an alternative embodiment, the method further comprises a pier-side segment constructing step, wherein the pier-side segment constructing step comprises erecting a bracket 110 beside the pier-side segment, and placing a pier-side segment 119 on the bracket 110.
By arranging the bracket 110 on the side pier and placing the side pier segment 119 on the bracket 110, the length of the T-shaped cantilever can be appropriately reduced, thereby facilitating the realization that the side pier and the middle pier have longer span and reducing the construction risk caused by the overlong T-shaped cantilever.
In an alternative embodiment, the side pier segment 119 and the pier top inter-segment 114 are glued and prestressed tensioned.
The side pier segment 119 and the pier top intermediate segment 114 are bonded together by cementing and pre-stressing, and can be firmly fixed together.
Specifically, taking the case where there are two intermediate piers as an example, the intermediate pier closer to the first end of the main beam 101 is defined as a first intermediate pier 112, the intermediate pier farther from the first end of the main beam 101 is defined as a second intermediate pier 113, the direction away from the first end is defined as a large-mileage direction, the direction close to the first end is defined as a small-mileage direction, the distance from the intermediate pier is from near to far, the pier top sections 114 connected to each intermediate pier are defined as a first pier top section 114 and a second pier top section 114 in sequence, and so on.
As shown in fig. 1, after the preparation work is completed, the method for erecting a bridge mainly comprises four steps:
A. pier top segment 118 installation; B. forming a T-shaped cantilever; C. closing the middle span; D. and constructing side pier sections.
As shown in fig. 2, the preparation work includes erecting a temporary support 109 beside two middle piers for supporting the middle of the girder 101; rear legs 105 are provided on first pier 116; a front support leg 102 is arranged on the second side pier 117; erecting a main beam 101; a front turning crown block 107 and a rear turning crown block 108 are placed on the main beam 101, and an end support device 106 is provided at a first end of the main beam 101. Wherein the distance between end support 106 and first pier 116 should facilitate the entry and exit of the transport segment vehicle.
As shown in fig. 2-4, the pier top segment 118 is installed by the following steps:
the vehicle transports the pier top segment 118 segment to the bridge girder erection tail, the front revolving crown block 107 and the rear revolving crown block 108 are both moved to the first end, i.e. the left end in the figure, of the bridge girder erection, and the front revolving crown block 107 lifts the pier top segment 118.
The front revolving crown block 107 suspends the pier top segment 118 to the vicinity of the first intermediate pier 112, rotates by 90 °, places the pier top segment 118, and anchors the pier top segment 118 to the first intermediate pier 112.
The first pier top leg 103 is installed on the pier top segment 118 of the first intermediate pier 112 with the first pier top leg 103 supporting the girder 101, and then the temporary brace 109 beside the first intermediate pier 112 is removed.
The pier top segment 118 of the second intermediate pier 113 is then installed, the second pier top leg 104 is installed, and the temporary brace 109 is removed from the second intermediate pier 113 adjacent the intermediate pier.
As shown in fig. 4-8, the process of forming the T-shaped cantilever is as follows:
as shown in fig. 4, the front revolving crown block 107 lifts the first inter-pier segment 114 of the first intermediate pier 112 in the major-range direction, moves the first inter-pier segment 114 to the pier top segment 118 of the first intermediate pier 112 in the major-range direction, and rotates the first inter-pier segment 114 in the major-range direction by 90 ° in a plane;
as shown in fig. 5, the rear revolving crown block 108 lifts the first inter-pier segment 114 of the first intermediate pier 112 in the small-mileage direction, moves the first inter-pier segment 114 to the pier top segment 118 of the first intermediate pier 112 in the small-mileage direction, and rotates the first inter-pier segment 114 in the small-mileage direction by 90 ° in a plane;
splicing, temporarily and permanently prestressing and tensioning the first pier top inter-section 114 and the pier top section 118 in the large mileage direction and the small mileage direction of the first intermediate pier 112;
as shown in fig. 6, then, hoisting, gluing, temporarily and permanently prestressing tensioning the first pier top inter-segment 114 in the large-mileage direction and the small-mileage direction of the second intermediate pier 113 is performed, and simultaneously, prestressed pipe grouting is performed on the first pier top inter-segment 114 of the first intermediate pier 112;
as shown in fig. 7, the second pier top intermediate sections 114 on both sides of the first intermediate pier 112 are glued, temporarily and permanently prestressed and tensioned, and the first pier top intermediate sections 114 on both sides of the second intermediate pier 113 are prestressed pipe grouted;
assembling pier top sections 114 of the T-shaped cantilevers of the first intermediate pier 112 and the second intermediate pier 113 in a circulating mode according to the steps.
As shown in FIG. 8, the mid-span wet joint construction is performed after the mid-span closure, i.e. the double T-shaped cantilever sections are spliced. The construction of the mid-span closure section is the key part of the whole box girder construction, the concrete of the closure section can be poured in the shortest time period of one day at the lowest temperature, the time period with smaller temperature difference change can be preferably selected, the pouring is completed in the shortest time as possible, the covering and the maintenance are carried out in time, the prestress is timely tensioned after the concrete reaches the strength and the elastic modulus required by the design, and the destructive cracks of the concrete of the closure section, such as temperature, shrinkage and the like, are reduced or avoided.
As shown in fig. 9, after the side pier segment construction, that is, the mid-span closure is completed, the ninth pier top segment 114 at the end of the double T-shaped cantilever is glued and prestressed and tensioned, the bracket 110 is erected at the side of the first side pier 116 facing the first intermediate pier 112 and at the side of the second side pier 117 facing the second intermediate pier 113, the multidirectional adjusting oil cap 111 is arranged on the bracket 110, and then the first side pier segment and the second side pier segment are sequentially placed on the multidirectional adjusting oil cap 111 of the bracket by the front revolving crown block 107 and the rear revolving crown block 108, wherein the first side pier segment is the side pier segment 119 farther from the intermediate pier and the second side pier segment is the side pier segment 119 closer to the intermediate pier. After the fine adjustment is completed, the front revolving crown block 107 and the rear revolving crown block 108 are used for respectively splicing the first side pier segment and the second side pier segment at the two ends, and prestress tensioning is performed. And finally, cementing the cemented first side pier segment and the cemented second side pier segment with the T-shaped structure, and performing prestress tensioning.
Example two:
referring to fig. 2, the bridge girder erection machine for implementing the bridge erection method according to any one of the foregoing embodiments includes a main girder 101 and a supporting device including an end supporting device 106 and a side supporting device including a side leg for being installed on a side pier, wherein the end supporting device 106 supports at least one end of the main girder 101. Specifically, in the present embodiment, the side legs include a front leg 102 and a rear leg 105.
Because the bridge girder erection machine provided by the aspect supports the main girder 101 through the side supporting legs, and the end supporting device 106 is arranged at one end of the main girder 101, a crown block on the main girder 101 can hoist a segment at one end of the main girder 101 and convey the segment to a corresponding pier or connect the segment which is fixed, the hoisting can be started as long as a vehicle for transporting the segment runs to the side of the side pier, and the vehicle which does not need to carry the segment runs to the side of the middle pier and then hoists, so that the requirement on site conditions is reduced.
In addition, the bridge girder erection machine may further include a first pier top leg 103 and a second pier top leg 104, a front turning crown block 107 and a rear turning crown block 108, and the installation manner of the front leg 102, the rear leg 105, the front turning crown block 107 and the rear turning crown block 108 is specifically explained in the above description of the method, and is not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; for example:
in the case of the first embodiment, there are two intermediate piers, and actually there may be three or four or more intermediate piers.
And the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of erecting a bridge, the bridge comprising a plurality of intermediate piers, the method comprising installing a pier top segment (118) on each intermediate pier and installing a pier top leg on each pier top segment (118), the pier top legs supporting a main girder (101) of a bridge girder erection machine; inter-pier segments (114) are then assembled starting from the top segment (118) of each of the intermediate piers, forming a T-shaped cantilever.
2. A method for erecting a bridge according to claim 1, wherein in said step of forming T-cantilevers, said inter-pier segments (114) are installed in pairs from the near to the far alternately for each of said top segments (118) on different ones of said intermediate piers.
3. A method for erecting a bridge according to claim 2, wherein temporary braces (109) are provided beside said intermediate pier to support said girders (101) before said pier top segment (118) is installed on said intermediate pier; -removing the temporary support (109) after installing the pier top segment (118) for each of the intermediate piers, before installing a section of the pier top inter-segment (114) for interference with the temporary support (109) for that intermediate pier.
4. A method according to claim 3, wherein a pier top leg is mounted on the pier top section (118) and the main girder (101) is supported by the pier top leg before the temporary support (109) is removed.
5. The bridge erection method according to claim 2, wherein the mid-span wet joint construction is performed while the inter-pier segments (114) on the intermediate piers on both sides of the same span are closed.
6. A method for erecting a bridge according to claim 1, wherein said pier top sections (118) are installed on each of said intermediate piers in sequence from a proximal end to a distal end of said main girder (101) when said pier top sections (118) are installed on each of said intermediate piers.
7. A method according to claim 6, wherein, when each of the coping segments (118) or the inter-coping segments (114) is to be installed, the coping segment (118) or the inter-coping segment (114) is first hoisted and transported by a turning crown block at the first end of the girder (101), the turning crown block is then used to rotate the coping segment (118) or the inter-coping segment (114), and then the coping segment (118) or the inter-coping segment (114) is installed in place.
8. The bridge erecting method according to claim 1, further comprising a pier-side segment constructing step, wherein the pier-side segment constructing step comprises erecting a bracket (110) beside the pier-side segment, and placing a pier-side segment (119) on the bracket (110).
9. The bridge erection method according to claim 8, wherein said pier-side segment (119) and said pier-top segment (114) are glued and prestressed-tensioned.
10. A bridge girder erection machine for carrying out the bridge erection method according to any one of claims 1 to 9, comprising a girder (101) and support means comprising end support means (106) and side support means comprising side legs for mounting on side piers, the end support means (106) supporting at least one end of the girder (101).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232644A1 (en) * | 2020-05-19 | 2021-11-25 | 中铁北京工程局集团有限公司 | Bridge erecting machine |
| CN114717947A (en) * | 2022-03-14 | 2022-07-08 | 中铁北京工程局集团第一工程有限公司 | Simply supported box girder segment assembling construction method based on moving support method |
| CN115030060A (en) * | 2022-06-17 | 2022-09-09 | 石家庄铁道大学 | Construction method for assembling porous continuous steel truss girder cantilever |
-
2020
- 2020-05-19 CN CN202010423184.8A patent/CN111424564A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232644A1 (en) * | 2020-05-19 | 2021-11-25 | 中铁北京工程局集团有限公司 | Bridge erecting machine |
| CN114717947A (en) * | 2022-03-14 | 2022-07-08 | 中铁北京工程局集团第一工程有限公司 | Simply supported box girder segment assembling construction method based on moving support method |
| CN115030060A (en) * | 2022-06-17 | 2022-09-09 | 石家庄铁道大学 | Construction method for assembling porous continuous steel truss girder cantilever |
| CN115030060B (en) * | 2022-06-17 | 2024-05-14 | 石家庄铁道大学 | Porous continuous steel truss cantilever assembling construction method |
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